The ________ nerve, which arises in the cervical plexus, innervates the diaphragm
A) ansa cervicalis
B) lesser occipital
C) radial
D) phrenic
E) sciatic
Answer: D
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The main function of a serous membrane is to
A) reduce friction. B) protect organs. C) allow blood to pass. D) hold organs together. E) fill empty spaces.
____________________ or systemic controls are regulatory mechanisms initiated outside an organ
Fill in the blank(s) with correct word
Answer the following statements true (T) or false (F)
1. Testosterone is produced by the seminiferous tubules. 2. Sperm develop in the walls of the seminiferous tubules. 3. The primary spermatocyte contains only 23 chromosomes. 4. The spermatozoa contain only 23 chromosomes. 5. Both the male and female gametes contain only 23 chromosomes.
Heat stroke is more likely to occur on overexertion during a prolonged exposure to a:
a. hot, humid environment b. hot, dry environment c. cold, humid environment d. cold, dry environment e. wet, rainy environment